Ideas for a new guy

So basically i just started out with this language not too long ago (maybe a week and a half), and I was hoping to get some ideas of what I should try creating as far as a console application goes. I've done a calculator, but that's as much as my current skills go, and even then it would not have been possible without following along with a youtube tutorial. Also where should I continue as far as lessons go? I don't understand arrays very well but can manage with declaring variables and some other very basic concepts. Oh, and here's the calculator if there's any suggestions to improve.

For cleaner code and more control, a switch method would be useful here for lines between 31 - 73. This isn't necessary as your program works great, just a good method to know. Read up on switches here: http://www.cplusplus.com/doc/tutorial/control/